| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
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987 pcs
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987 pcs | On Request | 1 | On Request | On Request | 11+12+Rohs | On Request | On Request |
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The LTC3855IUJ from Analog Devices is a versatile dual, multiphase synchronous DC/DC controller designed for efficient power management. This controller features differential remote sense capabilities, enhancing regulation accuracy. It operates with a nominal frequency of 500 kHz, with the ability to reach up to 770 kHz at higher VFREQ settings, and a lowest frequency of 250 kHz. The device provides precise control with a minimum on-time of 90 ns and gate drive delays of 30 ns for both top and bottom gates.
Key electrical characteristics include an internal VCC voltage of 5V, a typical EXTVCC switchover voltage of 4.7V, and an EXTVCC voltage drop of 50 mV. The controller boasts a high power supply rejection ratio of 100 dB and a typical gain bandwidth product of 3 MHz. The differential amplifier offers a gain of 1 V/V and a slew rate of 2 V/µs. The PGOOD output has a trip level of ±10% relative to the set output voltage.
Designed for surface mount applications, the LTC3855IUJ is suitable for various power conversion systems requiring robust and accurate DC/DC control. Its specifications, including a typical maximum output current of 3 mA and a maximum output voltage of VINTVCC – 1.1 V, make it a reliable component for demanding electronic designs.
Top gate off to bottom gate on delay is 30 ns, and bottom gate off to top gate on delay is 30 ns, typical, with a 3300pF load.
90 ns minimum.
5V typical, for input voltage 6V to 38V.
500 kHz typical, with a range of 250 kHz to 770 kHz depending on VFREQ voltage.
PGOOD trips when the feedback voltage deviates by ±10% from the nominal value.
1 V/V typical.
90 degrees typical when PHASMD is floating.